Katulampa floodgate, Water management structure in Katulampa, Indonesia

The Katulampa floodgate is a 74-metre weir on the Ciliwung River in Katulampa, Bogor, built of rounded stones set in mortar between thick vertical piers. It has five inlet sluices and three spillway sluices, each 4 metres wide, with dark timber beams and gates at the top of a sloped apron. A flat concrete deck with blue metal railings and a long white canopy roof runs above the piers.

Construction began on 16 April 1911 and was completed in early October 1912; the weir was inaugurated on 11 October 1912 by Governor General A. W. F. Idenburg, at a cost of 80,000 guilders. Designed by Ir. Hendrik van Breen, it was built after the major Jakarta flood of 1872 to divert Ciliwung water into the Kali Baru Timur irrigation channel. It has 74 m of length, five inlet sluices and three discharge sluices, each 4 m wide.

The name reflects the location where it stands in Katulampa. Local people watch water levels closely and share flood information through their networks, making it part of their daily awareness during rainy seasons.

Visitors should plan their trip during or shortly after rainfall to see the installation operating actively. The best times to observe the gates in action are during the rainy season when water flow is strongest.

The installation operates using a precise measurement system that activates different alert levels as water reaches certain heights. This early warning mechanism gives communities hours of preparation time before water arrives at downstream locations.